口々 くちぐち
kuchiguchini

Adverb

1. each and every person (saying); one and all; unanimously; in unison; separately; individually

その不当 ふとう あつかいを口々 くちぐち うったえた。
sono futōna atsukaio kuchiguchini uttaeta.
Everyone complained about the unfair treatment.
Other forms: